Since the 6FL retrofit kit has been discontinued I am going to attempt to retrofit this by making my own harness. I ordered all the parts for the fiber optic cables, connectors, USB hub, USB/AUX in and will update this thread on my success, (or lack thereof) when I have more information. Still would prefer to do this with the kit but the only items within the kit that are unavailable are the 2 wiring harnesses, so I will attempt to make those. Wish me luck!

So I was able to get this installed by reverse engineering the harness and ordering the parts from the retrofit kit that were available. I am doing a writeup of the full process including making the fiber optic MOST bus cables, where to install the fiber connections etc. The two added modules, the ULF-SBX-H and the USB hub each only have 2 connections to the car, one for power, the other for ground. The audio cable from the USB plug connects directly to the ULF-SBX-H, but a different cable is needed from the one that connects to the back of the head unit, the original has 3 wires, L, R and Gnd, the ULF one has 4, L,R,Gnd and Shield.
In the meantime if anyone has questions PM me here.

So I was able to get this installed by reverse engineering the harness and ordering the parts from the retrofit kit that were available. I am doing a writeup of the full process including making the fiber optic MOST bus cables, where to install the fiber connections etc. The two added modules, the ULF-SBX-H and the USB hub each only have 2 connections to the car, one for power, the other for ground. The audio cable from the USB plug connects directly to the ULF-SBX-H, but a different cable is needed from the one that connects to the back of the head unit, the original has 3 wires, L, R and Gnd, the ULF one has 4, L,R,Gnd and Shield.
In the meantime if anyone has questions PM me here.

I look forward to your writeup on this, I've been wanting to add this myself for some time and plan to getting around to it in the next few months. At least until I can save up for a CIC+Combox retrofit, but then I could just use the wiring I'd retrofit in.

It works
Everything works! I have IPOD and USB, figured out the coding using NCSexpert.
To get people started here is the parts list, the items listed in quantity 10 must be ordered in multiples of 10, unless you have a dealer who will sell them as singles, I needed 12 sockets and 2 pins for the actual work:
Parts list

The second fiber option is for people who dont want to try and terminate their own fiber optic cable like I did. I only attempted it because I have terminated multimode fiber in the past and understand the concepts of what a bad termination looks like. I used the polishing paper to get a nice clean end to the cables I made, more on that later for the brave ones who want to attempt it.

What about the part numbers for the hard parts like MULF and hub? What else is needed to add this capability?

The HUB is there in the parts , the MULF has several different part numbers over the years, look on REALOEM or BMWFANS.info. I got mine from a guy in the UK on Ebay. Just make sure its a MULF High or ULF-SBX-H with the most connectors. The first one I picked up is missing the USB connectors and is only useful for Bluetooth. The only other items that are needed are some quality wire for power and a length of 3 pin shielded wire (4 total connections) to go from the socket to the Mulf. Above is the list of items I needed to order from BMW to get this to work. If you do not have a TCU then you also need a bracket 65-15-9-135-687. I have one of these cheap if someone wants to make an offer

Yes I took a lot of photos that I need to go in and edit and annotate, that will come later. I wanted to get the parts list out there since there is a lead time on parts. I tapped into power on the TCU power and ground connections since the mulf attaches to the same fuse. If I had to do it again I would just run a separate ground up to the grounding block the TCU connects to, which I have a picture of. I figured that out after I made the harness.

I have Premium package with Nav/BlueTooth and iPod/USB option 6FL in my build but didn't get 6NF and to late now. Do I just need to order the baseplate part number or is there more to it?

Wondering if all the wiring already there to just add the base-plate in? Realoem doesn't really show much. There is some type of media component, not sure if that is needed or already there with 6FL in a 2011.

I have Premium package with Nav/BlueTooth and iPod/USB option 6FL in my build but didn't get 6NF and to late now. Do I just need to order the baseplate part number or is there more to it?

Wondering if all the wiring already there to just add the base-plate in? Realoem doesn't really show much. There is some type of media component, not sure if that is needed or already there with 6FL in a 2011.

I don't have the car yet, will be here in three of more weeks.

Check with Patrys, one of the vendors on the board. He's recently announced the 6NR retrofits which would include 6NF capabilities.

I have a 2009 E93 w/ premium package, no nav. I was able to obtain the 6FL retrofit kit from a U.S. OEM parts retailer who obtained it from Germany. Bought the correct, necessary MULF High module from another OEM, and installed the kit and module myself.

Attempted coding via OBD/NCS and CAN. Found out the radio head (rad2) that everything works through is only fully codable via the MOST bus (fiber optic), and wasn't willing to invest in more hardware. Met w/ the very cool shop foreman at the local BMW dealer who coded me up for a VERY reasonable price (less than an hour labor ), and I am good to go!

I would be happy to share part numbers and experiences via pm or email with anyone who is interested. There are some particular issues with the model year (2009) and verts that I could flag. I've got to tell you, though, it's not exactly a cost-effective (that is, smart!) way to play music in your ride (a little less than $1k total), but it was a real fun challenge just to pull it off.

As far as i understand (I know i could be wrong) the only thing i need to make this work is the actual 6FL kit, install by connecting to existing TCU and code it to work?

Please any and all help is appreciated.

TCU don't work for 6FL.

the 6FL kit should come with a MULF2 which controls the USB and Aux in. your cd changer may or may not work after this retrofit. if you currrently do not have bluetooth phone, you may want to do the retrofit at the same time.